3. Fill in the sentences with have to, don't have to. 1 You  go to the desert to see camels. You can see them at the zoo. 2 You  work hard if you want to become a doctor. It is not easy. 3 You  come with me. I'm the only one who knows how to get there. 4 We  do something to protect the environment. 5 You  give me a lift. I will walk. 6 You  do the washing up. Patty has done it already.

Using 'have to' and 'don't have to'

Remember: 'have to' means obligation, 'don't have to' means no obligation.

Answers:

• 1. You don't have to go to the desert to see camels. You can see them at the zoo. (Seeing camels at the zoo means it's not necessary to go to the desert.)
• 2. You have to work hard if you want to become a doctor. It is not easy. (Becoming a doctor requires hard work; it's an obligation.)
• 3. You don't have to come with me. I'm the only one who knows how to get there. (The speaker knows the way, so the other person doesn't have to accompany them.)
• 4. We have to do something to protect the environment. (Protecting the environment is a shared responsibility/necessity.)
• 5. You don't have to give me a lift. I will walk. (The speaker is offering an alternative, indicating the other person's help is not required.)
• 6. You don't have to do the washing up. Patty has done it already. (The task is already completed, so there's no need for anyone else to do it.)